Improved material for dyeing and printing



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Letters Pa/tmt No. 93,900, dated August 17, 1869.

IMPROVED MATERIAL FOR DYEING AND PRINTING, OBTAINED FROM MADDER.

The Schedule referred to in these Letters Patent and making part of thesame,

To all whom it may concern Be it known that I, ALFRED PARAF, of France,at present a resident in the city, county, and State of New York, havemade an invention or discovery of a new article of manufacture suitablefor dyeing and printing, which I denominate Tinctorine and that thefollowing is a full, clear, and exact description and specification ofmy said invention or discovery.

My invention is apeculiar reddish-brown preparation or extract, producedfrom rrradder-root, and consisting of the coloring-matter of themadder-root combined or compounded with fatty and resinous matters, butpractically free of pectic acid or its compounds. 7

Previous to its production, colored extracts of madder-root had beenknown, and such may be divided into two classes, viz, the pure coloredextract of madder, obtained by-chemists, consisting of purpurine andalizarine, in a practically pure state; and the impure commercialextracts produced for dyeing and printing, consisting of the saidprinciples, (purpurine and slimrine,) either mixed or combined withcertain fatty and resinous matters, and with pectic acid, or itscompounds, or mixed or combined with compounds of copper. v

'ihe new article of rnanufircture, denominated by me tinctorine, diifersfrom madder-extracts of the first class, by containing certain of thefatty and resinous matters derived from the madder-root, while itdiffers mainly from some n'radder-extracts of the second class by beingpractically free of pectic acid, or its compounds; and it differs fromanother extract of the second class by being free of compounds ofcopper.

The said tincton'ne has been found by practice to be particularlyadapted to the printing of cloths, and it is believed that its value forthis purpose results from the difference between its constitution andthose of previous madder-extracts, as above stated the practical efl'ectof pectic acid, when present in a madderextract used for printing, beingto transform certain portions of the coloring-matter of inadder intosoluble compounds during the steaming to which the printed fabric issubjected, for the purpose of fixing the colors, so that madder-extraotcontaining it, contains an agent destructive of the printed color, ,thepractical efi'ect of the presence of copper-compounds being to prodnceadirty color, while pure purpurine and alizarine are not only too costlyto be used for printing, but are found to be practically unsuited to it,by reason, it is believed, of the absence of all fatty matters.

I prefer to prepare my new article by the process and means described byme in the specification of Letters Patent of the United States, N 0.86,939, dated the 16th day of February, A. D. 1869, using, bypreference, a digestcr, as therein described; but my'present inventionor discovery is not restricted by the process or means used in preparingit, as rt rs possrble to vary these, without materially changing theconstitution or the valuable properties of the article produced.Moreover, it is not restricted to an article containing the peculiarfatty or resinous matters derived from madder-root, or to one containingthose matters without others, because those matters might be changed fortheir substitutes or equivalents, and the material might be adnlteratedby the addition of material that is harmless to the color, withoutmaterially changing the constitution and properties of the article thatrender it valuable for printing-purposes.

The material may also be rendered more valuabl for printing-purposes, bycompounding or combining it with other materials.

What I claim as my invention or discovery, and dc, sire to secure byLetters Patent, is-- The new article of manufacture hcreinbeforedescribed, and denominated tinctorine.

In testimony whereof, I have hereunto set my hand, this 28th day ofJuly, A. D. 1869.

ALFRED PARAF.

Witnesses:

JULIUs Gnrrsox, W. O. WITTER.

